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usr
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lib
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modules
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3.10.0-1062.9.1.el7.x86_64
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build
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include
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linux
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i2c
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Filename :
pxa-i2c.h
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/* * i2c_pxa.h * * Copyright (C) 2002 Intrinsyc Software Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * */ #ifndef _I2C_PXA_H_ #define _I2C_PXA_H_ #if 0 #define DEF_TIMEOUT 3 #else /* need a longer timeout if we're dealing with the fact we may well be * looking at a multi-master environment */ #define DEF_TIMEOUT 32 #endif #define BUS_ERROR (-EREMOTEIO) #define XFER_NAKED (-ECONNREFUSED) #define I2C_RETRY (-2000) /* an error has occurred retry transmit */ /* ICR initialize bit values * * 15. FM 0 (100 Khz operation) * 14. UR 0 (No unit reset) * 13. SADIE 0 (Disables the unit from interrupting on slave addresses * matching its slave address) * 12. ALDIE 0 (Disables the unit from interrupt when it loses arbitration * in master mode) * 11. SSDIE 0 (Disables interrupts from a slave stop detected, in slave mode) * 10. BEIE 1 (Enable interrupts from detected bus errors, no ACK sent) * 9. IRFIE 1 (Enable interrupts from full buffer received) * 8. ITEIE 1 (Enables the I2C unit to interrupt when transmit buffer empty) * 7. GCD 1 (Disables i2c unit response to general call messages as a slave) * 6. IUE 0 (Disable unit until we change settings) * 5. SCLE 1 (Enables the i2c clock output for master mode (drives SCL) * 4. MA 0 (Only send stop with the ICR stop bit) * 3. TB 0 (We are not transmitting a byte initially) * 2. ACKNAK 0 (Send an ACK after the unit receives a byte) * 1. STOP 0 (Do not send a STOP) * 0. START 0 (Do not send a START) * */ #define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE) /* I2C status register init values * * 10. BED 1 (Clear bus error detected) * 9. SAD 1 (Clear slave address detected) * 7. IRF 1 (Clear IDBR Receive Full) * 6. ITE 1 (Clear IDBR Transmit Empty) * 5. ALD 1 (Clear Arbitration Loss Detected) * 4. SSD 1 (Clear Slave Stop Detected) */ #define I2C_ISR_INIT 0x7FF /* status register init */ struct i2c_slave_client; struct i2c_pxa_platform_data { unsigned int slave_addr; struct i2c_slave_client *slave; unsigned int class; unsigned int use_pio :1; unsigned int fast_mode :1; }; extern void pxa_set_i2c_info(struct i2c_pxa_platform_data *info); #ifdef CONFIG_PXA27x extern void pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info); #endif #ifdef CONFIG_PXA3xx extern void pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info); #endif #endif